Surgical Navigation Frame with Rotatable Yoke and Universal Guide
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Solution Overview
Problem
Current medical systems lack an efficient method for accurately placing and delivering diagnostic or therapeutic devices within the body during image-guided surgeries, particularly in complex anatomical regions like the brain, where precise trajectory control and quick device exchange are essential.
Innovation Solution
An image-guided interventional system featuring a frame with a support column and removable tubular adapter, allowing for secure attachment to the patient's body and precise orientation along desired intrabody trajectories, along with user-activatable actuators for manual or remote control of the frame's position, and a guide for inserting various devices like stimulation leads, catheters, or biopsy needles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a fixed frame structure is used for device placement, then structural stability is improved, but adaptability for different trajectories and devices is worsened
Solution Approach 1:
The frame incorporates movable components including a rotatable yoke assembly that can pivot about a roll axis, and a platform that can rotate about a pitch axis. These dynamic elements allow the support column to be oriented along different intrabody trajectories while maintaining frame stability, resolving the contradiction between fixed structure and adaptive positioning
Solution Approach 2:
The frame is divided into separable functional modules: a base for securing to the patient, a yoke assembly for roll rotation, a platform for pitch rotation, and a support column for device guidance. This segmentation allows each component to perform its specific function independently while contributing to the overall adaptive positioning capability
2Adaptability or versatility
If multiple devices are exchanged during procedure, then treatment versatility is improved, but procedure time is worsened
Solution Approach 1:
The support column with its axially-extending guide bore serves as a universal interface that can accommodate multiple different interventional devices including stimulation leads, ablation probes, catheters, and biopsy needles. This multi-functional design allows rapid device exchange without requiring trajectory repositioning, reducing procedure time while maintaining treatment versatility
Solution Approach 2:
The frame and support column are pre-positioned and oriented along the desired trajectory before device insertion. This preliminary positioning action allows multiple devices to be exchanged quickly at the pre-established trajectory without requiring time-consuming repositioning between device changes
3Manufacturing precision
If precise trajectory control is implemented, then device placement accuracy is improved, but system complexity is worsened
Solution Approach 1:
The support column acts as an intermediary element between the adjustable frame structure and the interventional device. It provides a stable axially-extending guide bore that ensures precise trajectory control for device insertion, while the frame's modular actuators (roll actuator, pitch actuator, X-Y actuators) provide the necessary adjustments without requiring complex integrated systems
4Ease of operation
If manual actuators are used for frame adjustment, then ease of operation is improved, but automation level is worsened
Solution Approach 1:
The frame incorporates manual actuators including dials and thumbscrew-type devices that allow the operator to directly adjust the frame position and orientation without requiring external automation systems. These self-contained manual adjustment mechanisms provide intuitive control while maintaining operational simplicity
Data Source
AI summary
A trajectory frame for use with surgical navigation systems includes a base having a patient access aperture formed therein. A yoke is mounted to the base and is rotatable about a roll axis. A platform is mounted to the yoke and is rotatable about a pitch axis. An elongated guide is secured to the platform and includes opposite proximal and distal end portions and a bore that extends from the proximal end portion to the distal end portion. The guide is configured to removably receive various devices therein for quick release therefrom, including an optical tracking probe (which may be a universal tracker) detectable by a camera-based tracking system or an EM probe detectable by an EM navigation system, a microelectrode probe driver adapter, a drill guide and drill bit, skull fixation device and driver, and a catheter guide.